And there came out a fire from the LORD, and consumed the two hundred and fifty men that offered incense.
Read Chapter 16
George Leo Haydock
Incense. Core had left them, and was busy in stirring up the people to rebellion, when a fire proceeding from the cloud, or from the altar, or perhaps a thunderbolt, (Calmet) came to arraign them before God's tribunal, there to meet their chief, and to hear the eternal sentence of separation from all good, which was instantly pronounced upon all who died impenitent. (Haydock)
Perhaps Core might have been offering incense with his 250 men, when the fire seized him, ver. 40. (Du Hamel)